The celebration of the Feast of the Holy Trinity goes back to the 10th century, although it was only four centuries later that the Feast of the Holy Trinity was universally recognised. Etienne, Bishop of Liège, composed the first Gregorian chants that were used in its offices, the music for the feast day being copied out constantly during the Middle Ages. The Psallentes ensemble has used an extraordinary manuscript that was preserved in St. Bavo’s Abbey in Ghent as the basis for this project, that undoubtly and right away joins the ranking of reference recording!